Definite integral calculator

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The calculator opens with the integral template ready: type the function and limits and press =. For example, ∫₀¹ x² dx = 1/3 and ∫₀^√3 1/(x²+1) dx = π/3.

How to use it

Type the function using the x key (or the keyboard: x^2).
Press ▶ to move to the lower limit, and again for the upper one.
Press =. With the keyboard, all in one go: int(x^2,0,1) and Enter.

Degrees or radians?

If the function has sines or cosines, switch to radians in SHIFT MENU → Unidad angular: in degrees, ∫ sin(x) from 0 to π isn't 2.

📘 Full guide with examples

Frequently asked questions

Does it find indefinite integrals (antiderivatives)?

No, it computes definite integrals numerically with high precision, and recognises exact results such as fractions, roots or π.

Can I integrate functions with ln, e or roots?

Yes: for example ∫₁ᵉ ln(x) dx = 1.

`º` / `Tab`	SHIFT / ALPHA (luego la tecla: `º7` = CONST)SHIFT / ALPHA (then the key: `º7` = CONST)
cos( sqrt( int(	Escribe el nombre de la función: sin/sen, cos, tan, asin, log, ln, exp, sqrt/raiz, cbrt, abs, int (integral), der (derivada), sum, prod, pol, rec, mcd, mcm, det...Type the function name: sin, cos, tan, asin, log, ln, exp, sqrt, cbrt, abs, int (integral), der (derivative), sum, prod, pol, rec, gcd, lcm, det...
pi e ans x A	π, número e, Ans, variable x; mayúsculas A–F y M son las memoriasπ, number e, Ans, variable x; capitals A–F and M are the memories
`,` `)`	En 2D la coma pasa al siguiente hueco y ")" sale de la plantilla: int(x^2,0,1)In 2D the comma jumps to the next box and ")" leaves the template: int(x^2,0,1)
`-` `~`	El menos es signo negativo al principio o tras un operador (5--3, 2-4); `~` lo fuerzaMinus is a negative sign at the start or after an operator (5--3, 2-4); `~` forces it
`=` `Enter`	`=` escribe el igual (CALC, SOLVE, Verificar); `Enter` calcula; `Shift`+`Enter` en decimal`=` types the equals sign (CALC, SOLVE, Verify); `Enter` calculates; `Shift`+`Enter` as a decimal
`^` `!` `%` `\|`	Potencia, factorial, porcentaje, valor absolutoPower, factorial, percent, absolute value
`Inicio` `Fin`	MENU y OPTN · `Supr`/`Esc` = AC · `⌫` = DELMENU and OPTN · `Del`/`Esc` = AC · `⌫` = DEL

Definite integral calculator

Unir PDFs

How to use it

Degrees or radians?

Frequently asked questions

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